Reward based on quantity

Hello,

I am using another plugin to grant discounts based on the quantity of cart-added products. So for example if the cart has 4x Book, it will give one of these books for free.

Is there a way to visualize this through FunnelKit Cart? So I need the rewards section based on the quantity instead of the amount.

Only displaying text is needed, the actual discount application is done by other plugin. So basically the “Free Shipping” Reward functionality just with quantity condition.

How can I do this? Please help me.

Thanks in advance!